Senior discounts are hit and miss. The general rule for senior discounts, specifically for museum entry, is that they are reserved for E.U. citizens. However, more often than not, the cashier will not question your citizenship when you are purchasing a ticket, so request a senior discount from the start. If they ask for ID, chances are you will be refused if you are not an E.U. citizen, but odds are favorable that they will not ask at all. E.U. citizens 65 years old and over may ride all public transportation within Budapest for free, but you must have a valid ID or passport to show inspectors, especially at the metro stations. All E.U. citizens may tour Parliament for free by providing their passport.